<?php
for ($i = 1; $i <= 10; $i++) {
    echo "{$i}张琳是渣男<br>";
}
echo '<hr>';
$a = 1;
while ($a <= 10) {
    echo "{$a}张琳是渣男<br>";
    $a++;

}

echo '<hr>';

$b = 1;
do {
    echo "{$a}张琳是渣男<br>";
  $b++;
}
while ($b <= 10);//条件判断
//while